I can obviously only speak for myself, but I've tried AI coding tools from time to time and with Opus 4.5 I have for the first time the impression that it is genuinely helpful for a variety of tasks. I've never previously claimed that I find them useful. And 10x more productive? Certainly not, even if it would improve development speed 10000x I wouldn't be 10x more productive overall since not even half of my time is directed towards development efforts.